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April 17, 1962
s. CHUDY
3,030,104
COMPENSATING LOCATORS
Filed Nov. 15, 1960
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United tates Patet
Patented Apr. 17, 19%2
1
3,030,104
~
CDMPENSATING LOCATORS
Stanley Chudy, 4110 Schenck Ave., Deer Park, Ohio
Filed Nov. 15, 1960, Ser. No. 69,472
1 Claim. (Cl. 269-52)
2
often are not true in respect to the bore 16.
In the
drawings this face error is exaggerated for the purpose of
illustration. Any face error can be corrected after hard
ening of the ?nished gear in the final grinding opera
tion. But if such face error exists, in all previous methods,
gear blanks which were rigidly > clamped between the
In the manufacture of precision gears, it is essential
shoulder 12 and the nut 13, the blank was distorted in
the ?nished gear has its teeth concentric with the bore of
relation to the bore and caused the ?nished gear to have
the gear for quiet operation and long life. At present
teeth out of true concentricity with the bore. However,
the gear blank is held on an arbor after being bored, by 10 with my improvement compensating locators are used
clamping against the faces of the gear. The cutting of
comprising an outer member 17 having an inner spherical
the gear teeth and all successive operations are performed
face 18 and an inner member 19 with a spherical face
with the blank held in this position. However, if the
20 mating with the spherical face 18 of the member 1'7.
faces of the gear blank are not machined on an absolute
The inner member 19 has a bore 21 ?tting the arbor
true perpendicular to the bore, the blank is often dis 15 11. One end '22 of the member 19 extends beyond the
torted, particularly on small diameter bores due to the
face 23 of the member 17 and the other end 24 is inside
clamping force on the faces with a consequent distortion
the face 25 of the member 17.
of the arbor and resultant error in the cut teeth in re
In the operation of the device, one of the compensa
spect to the bore. My improvement positions the gear
tors is placed on the arbor with the face 22 abutting the
20
blank in absolute trueness with the bore regardless of
shoulder 12. The work piece is slipped on the arbor and
any error in the faces, whereby the teeth will be cut in
the other compensator clamped to the work piece by
true concentricity with the bore.
.
means of the arbor nut 13.
It will be understood that this device is not limited to
adjust to the faces 15 on
gears, but can be used on any work piece having a bore
parting
any strain on the
and on which a true concentric peripheral face in respect 25 machining of the peripheral
to the bore is desired to be machined.
parallelism with the bore.
The object of my invention is to provide ?oating clamp
between the inner members
The outer members 17 will
the work piece without im
arbor, thus maintaining the
face of the work piece in true
Radial forces are asserted
19 and the outer members 17
in the clamping action.
centricity with the bore while machining the peripheral 30 Having thus fully described my invention, What I claim
face.
.
as new and desire to secure by Letters Patent, is:
A further object is to provide a pair of members for
In a work piece compensating locator, an arbor, a
clamping the work piece on an arbor consisting of com
work piece having a bore ?tting said arbor, a compensa
members on an arbor to hold a work piece in true con
pensating inner members on the arbor and ‘outer mem
bers radially engaged with the inner members to adjust 35
to face errors in the work piece.
My invention will be further readily understood from
the following description and claim, and from the draw
ings, in which latter:
tor on each side of said work piece, means for clamping
said Work piece between said compensators, said compen
sators having outer members and inner members with
mating spherical faces between said members and said
inner members having end faces extending beyond the
faces of said outer members, said outer members having
FIG. 1 is a horizontal cross-section of my invention 40 faces extending beyond the other faces of said inner mem
mounted on an arbor.
bers whereby said inner members will assert a radial
FIG. 2 is a vertical cross-section of the same, taken in
clamping force on the outer members for securely hold~
the plane of the line 2-2 of FIG. ‘1.
My improvement is designed for use with an arbor 11
which may be a plain arbor as shown in the drawings
ing said work piece in true alignment with its bore.
References Cited in the ?le of this patent
or an expanding arbor which is well known in the art.
The arbor 11 has a shoulder 12 and a clamping nut 13.
In the machining of gears, the gear blank 14 is bored
1,216,244
2,089,410
McDowell ____________ __ Feb. 13, 1917
Olson ________________ .._ Aug. 110, 1937
and the faces 15 are semi-?nished, however, the faces
2,576,497
Austin et al ___________ __ Nov. 27, 195 1,
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UNITED STATES PATENTS